Based on this information, what is an accurate description of the function of DNA?

The rate at which molecules water and oxygen can enter a cell is determined by the-

In terms of alternation of generations, the internal parts of the pollen grains of seed-producing plants are most similar to a ) moss sporophyteb) moss gametophyte bearing both male and female gametangiac) fern sporophyted) fern gametophyte bearing only antheridia

What is the main fuel source for the work of the cell